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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • GIA 5172058360

Certificate GIA 5172058360

Diamond specifications and retailer prices

From $5,689 AUD
As of November 6, 2026
Save $6,196 AUD (52%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $11,885 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5172058360. Listed at 23 retailers as of November 4, 2026, with prices from $5,689 to $11,885, a $6,196 spread on the same certified stone. MOH London lists it at $11,885. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5172058360
Dimensions6.59 × 6.23 × 4.30 mm
L/W Ratio1.06
Top View
6.59 mm6.23 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceMedium
CertificateGIA 5172058360
Side View
Table 66.0%CrownGirdle: STK-EXTPavilionCulet: NoneDepth 69.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $11,885 AUD|Low: $5,910 AUD|High: $12,061 AUD|Avg: $7,724 AUD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 6$5,910 AUD
Retailer 9$5,958 AUD
Retailer 7$6,033 AUD
Retailer 10$6,778 AUD
Retailer 3$7,060 AUD
Retailer 2$7,414 AUD
Retailer 8$7,542 AUD
Retailer 4$8,418 AUD
Retailer 5$9,128 AUD
MOH London$11,885 AUD

35 data points across 10 retailers

23 retailers$5,689 AUD to $11,885 AUD

A
Cheapest Retailer
-
$5,689 AUD
B+
Retailer 2
-
$5,845 AUD
View
B+
Retailer 3
-
$5,910 AUD
View
B+
Retailer 4
-
$5,958 AUD
View
Final sale: no returns
B+
Retailer 5
-
$5,980 AUD
View
Retailer 6
-
$6,033 AUD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
$6,399 AUD
View
B+
Retailer 8
-
$6,404 AUD
View
Retailer 9
-
$6,778 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$7,060 AUD
View
B+
Retailer 11
-
$7,126 AUD
View
B+
Retailer 12
-
$7,137 AUD
View
B+
Retailer 13
-
$7,155 AUD
View
B+
Retailer 14
-
$7,414 AUD
View
Retailer 15
-
$7,542 AUD
View
Price last confirmed 29 days ago
B+
Retailer 16
-
$7,612 AUD
View
B+
Retailer 17
-
$7,612 AUD
View
B
Retailer 18
-
$7,859 AUD
View
Retailer 19
-
$8,258 AUD
View
Price last confirmed 15 days ago
B
Retailer 20
-
$8,418 AUD
View
B
Retailer 21
-
$9,128 AUD
View
B
Retailer 22
-
$10,830 AUD
View
Most Expensive
B
MOH London
24751E2B7 · Nov 4
$11,885 AUD
£6,430 GBP
View
22 more retailers have this diamond
Prices start from $5,689 AUDSave up to $6,196 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Cushion
$5,689 AUD